चत्वारिंशत्सहस्राणि मनोरन्तरमुच्यते मन्वन्तरस्य कालस्तु युगैः सह प्रकीर्तितः //
catvāriṃśatsahasrāṇi manorantaramucyate manvantarasya kālastu yugaiḥ saha prakīrtitaḥ //
On dit que l’intervalle entre les Manus (manorantara) est de quarante mille (ans). La durée d’un Manvantara, avec ses Yuga, est ainsi proclamée.
It frames creation and dissolution as recurring, measurable cycles: Manvantaras proceed with Yugas, and even the transition between Manus (manorantara) has a defined duration.
By emphasizing long cosmic cycles, it encourages dharmic steadiness—kings and householders should act with a sense of time-tested order (yuga-dharma), not short-lived impulse.
No direct Vastu or ritual procedure is stated; the significance is indirect—ritual calendars and temple traditions often align observances to yuga/manvantara concepts taught in Purāṇic chronology.